diff --git a/underworld/__init__.py b/underworld/__init__.py
index cc11ac1bb..613905cf6 100644
--- a/underworld/__init__.py
+++ b/underworld/__init__.py
@@ -30,7 +30,7 @@
 on a geological timescale.
 """
 
-__version__ = "2.2.1b"
+__version__ = "2.2.2b"
 
 # ok, first need to change default python dlopen flags to global
 # this is because when python imports the module, the shared libraries are loaded as RTLD_LOCAL